I have been using Irfanview to cut photos, cliparts or anything because it doesn't ruin the quality of your photos, unlike when you're using Microsoft Paint or any other photo/graphic viewer.
Irfanview is very easy to use. The first time I used it, I immediately found out how efficiently I can do my work or editing without having to read any help file or tutorial.
It supports a huge list of file formats, which you'll see upon installation. So I use it to open any kind of graphics or photos. Heck, it can even open video files and flash animations!
It has photo-editing built-in function. If you're not familiar with Adobe Photoshop or any advanced photo-editing applications, you can use Irfanview to edit your photos. It can apply different effects unto your photos, you can resize it without affecting the quality of the photo, adjust colors and more.
I still use Adobe Photoshop, of course. But I can't go anywhere without Irfanview. I'm not exaggerating. I love it!
The best thing about Irfanview is.... IT'S FREE!!!
So, click here to go to Irfanview's official website and download it!